Cyclotomic(n,-n) is prime.

Terms

a(0) =1a(1) =3a(2) =4a(3) =5a(4) =6a(5) =9a(6) =12a(7) =14a(8) =17a(9) =82a(10) =86a(11) =157a(12) =158a(13) =180a(14) =210a(15) =236a(16) =245a(17) =368a(18) =462a(19) =842a(20) =1034a(21) =3512a(22) =3977a(23) =8636